import pygame.font


class Button():
    def __init__(self, screen, msg):
        """
        初始化按钮的属性
        """
        self.screen = screen
        self.screen_rect = screen.get_rect()

        # 设置按钮的尺寸和其他属性
        self.width, self.height = 200, 50
        self.bg_color = (190, 190, 190)
        self.color = (255, 255, 255)
        self.font = pygame.font.SysFont(None, 48)

        # 创建按钮的rect对象，并居中
        self.rect = pygame.Rect(0, 0, self.width, self.height)
        self.rect.center = self.screen_rect.center

        # 按钮的标签只需要创建一次
        self.prep_msg(msg)

    def prep_msg(self, msg):
        """
        将msg渲染为图像，并使其在按钮上居中
        """
        self.msg_img = self.font.render(msg, True, self.color, self.bg_color)
        self.msg_img_rect = self.msg_img.get_rect()
        self.msg_img_rect.center = self.rect.center

    def draw_button(self):
        """
        绘制一个用颜色填充的按钮，再绘制文本
        """
        self.screen.fill(self.bg_color, self.rect)
        self.screen.blit(self.msg_img, self.msg_img_rect)
